1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d7b43dac5ef13c5f48d1467bff46ec5d444cc91331f3fb07828e1e8eb85e65. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a7c0eec-4a23-40ba-adeb-ee9d0a5cf451.json and https://artists.proofprofile.net/proofs/artist/8a7c0eec-4a23-40ba-adeb-ee9d0a5cf451.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715300130e4a5660b9f3f51fac2b87173d2f22827efbbfd339d5880894a665af. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2590829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc144b0d51e9a28518128fe32cf46897f351a25b35f4e446bffcf7350ea8000bc. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2590831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf612a0b6fbc5677adbe114cd5800dc4d65206046a3b764e9c2c78e5bb36155. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2590838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666ff9b37d6074d9d48650b6345eeb4589b7ada655632a9d1484d4b48f54dbaa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2590840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8852a2aefc1ef5270b9f6ef63ab579373c2b691007aa0478ab6bbe2e02dc0e1d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:57:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2590842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f18757e3496664d7a17da071c1c0e56df5e687af9f0d521aada9bbb12fb79. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:01:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2590845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61529b81d4ceb519e3db07fd1502b717045cc08430b5e31622b47baf562aa0a6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2590854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79470a4e68441eb59ff3bc14a5fc2c86c018d870a276c91839068fab5e74c325. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:20:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2590856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb5dbd730ac9686779cedf0871adced8b21e1075d672ca6d944c2bcd5d6eea1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2590858.